1. Transparent transmission (point to point). To transfer the data in a transparent way, the transmitter contains the address of the target module. The module with the same address and the same channel is used in pairs. 2. Transparent transmission (broadcast). With the same address, channel, and air data rate, each module can send data, and the others can receive it. Each module can work as a transmitter or receiver. The sending data is completely transparent, meaning the received data is exactly what the transmitter sent. 3. Fixed transfer mode (point to point). The module supports an address function, requiring hexadecimal input. The master can send data to other modules with any address or channel, enabling networking or functioning as a repeater. 4. Fixed transmission mode (monitoring). The module with address 0xFFFF can monitor any other module on the same channel. The transmitted data is received from any other module with the same channel and address. Modules with the same address and channel are used in pairs.